Takes any vector of ISO 639-1 codes and returns ISO 639-3 code.
Examples
iso3.iso1('bs')
#> bs
#> "bos"
iso3.iso1(c('co', 'it', 'ar'))
#> co it ar
#> "cos" "ita" "ara"
Takes any vector of ISO 639-1 codes and returns ISO 639-3 code.
iso3.iso1('bs')
#> bs
#> "bos"
iso3.iso1(c('co', 'it', 'ar'))
#> co it ar
#> "cos" "ita" "ara"